National Instruments NI 9792 User manual

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Find the National Instruments NI 9792 at our website: Click HERE

USER GUIDE AND SPECIFICATIONS
NI 9792 WSN Real-Time Gateway
This user guide describes how to use the NI 9792 Wireless Sensor Network Real-Time Gateway and lists
specifications. The NI 9792 WSN Real-Time Gateway combines with NI WSN-32xx nodes to form a
wireless sensor network. Figure 1 shows the NI WSN system components.
Figure 1. NI WSN System Components
1 PC or NI Real-Time Hardware Running
Application Software
2 NI 9792 WSN Real-Time Gateway
3 9–35 VDC Power Supply Connection
4 NI WSN-32xx Nodes
5 Ethernet Cable/Connection
5
4
3
4
2
1

NI 9792 WSN Real-Time Gateway User Guide and Specifications 2 ni.com
The NI 9792 WSN Real-Time Gateway is shown in Figure 2.
Figure 2. NI 9792 WSN Real-Time Gateway

NI 9792 WSN Real-Time Gateway User Guide and Specifications 3 ni.com
Dimensions
Figure 3 shows the NI 9792 WSN Real-Time Gateway device dimensions.
Figure 3. NI 9792 WSN Real-Time Gateway Device Dimensions
Safety Guidelines
Operate the NI 9792 WSN Real-Time Gateway only as described in this user guide.
Hot Surface This icon denotes that the component may be hot. Touching this component may result
in bodily injury.
NI WSN Safety Information
The following section contains important safety information that you must follow when installing and
using NI WSN products.
Caution Do not substitute parts or modify the NI WSN product. Use the product only with the
devices, accessories, and cables specified in the installation instructions.
Caution Do not operate a NI WSN products in an explosive atmosphere or where there may be
flammable gases or fumes. If you need to operate NI WSN products in such an environment, the
NI WSN products must be in a suitably rated enclosure.
Caution If you need to clean a NI WSN product, use a dry towel. The product must be completely
dry and free from contaminants before you return it to service.
87.56 mm
(3.447 in.)
83mm
(3.268 in.)
170.55 mm
(6.715 in.)
86.25 mm
(3.396 in.)
43.47 mm
(1.712 in.)
91.38 mm
(3.598 in.)
124.84 mm
(4.915 in.)
95.63mm
(3.765 in.)
170.55 mm
(6.715 in.)

NI 9792 WSN Real-Time Gateway User Guide and Specifications 4 ni.com
Caution Operate the product only at or below Pollution Degree 2. Pollution is foreign matter in a
solid, liquid, or gaseous state that can reduce dielectric strength or surface resistivity. The following
is a description of pollution degrees:
• Pollution Degree 1 means no pollution or only dry, nonconductive pollution occurs. The pollution
has no influence.
• Pollution Degree 2 means that only nonconductive pollution occurs in most cases. Occasionally,
however, a temporary conductivity caused by condensation must be expected.
• Pollution Degree 3 means that conductive pollution occurs, or dry, nonconductive pollution occurs
which becomes conductive due to condensation.
Caution You must insulate signal connections for the maximum voltage for which the NI WSN
product is rated. Do not exceed the maximum ratings for the product. Do not install wiring while
the product is live with electrical signals. Do not remove or add connector blocks when power is
connected to the NI WSN system. Avoid contact between your body and the connector block signal
wiring when hot-swapping devices.
Operate NI WSN products at or below the installation category1marked on the hardware label.
Measurement circuits are subjected to working voltages2and transient stresses (overvoltage) from
the circuit to which they are connected during measurement or test. Installation categories establish
standard impulse withstand voltage levels that commonly occur in electrical distribution systems.
The following is a description of installation categories:
• Installation Category I is for measurements performed on circuits not directly connected to the
electrical distribution system referred to as MAINS3voltage. This category is for measurements of
voltages from specially protected secondary circuits. Such voltage measurements include signal
levels, special equipment, limited-energy parts of equipment, circuits powered by regulated
low-voltage sources, and electronics.
• Installation Category II is for measurements performed on circuits directly connected to the
electrical distribution system. This category refers to local-level electrical distribution, such as that
provided by a standard wall outlet (for example, 115 V for U.S. or 230 V for Europe). Examples
of Installation Category II are measurements performed on household appliances, portable tools,
and similar products.
• Installation Category III is for measurements performed in the building installation at the
distribution level. This category refers to measurements on hard-wired equipment such as
equipment in fixed installations, distribution boards, and circuit breakers. Other examples are
wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation,
and stationary motors with permanent connections to fixed installations.
• Installation Category IV is for measurements performed at the primary electrical supply
installation (<1,000 V). Examples include electricity meters and measurements on primary
overcurrent protection devices and on ripple control units.
Safety Guidelines for Hazardous Locations
The NI 9792 is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous locations;
Class I, Zone 2, AEx nC IIC T4 and Ex nA IIC T4 hazardous locations; and nonhazardous locations
only. Not following these guidelines may result in serious injury or death.
1 Installation categories, also referred to as measurement categories, are defined in electrical safety standard IEC 61010-1.
2 Working voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation.
3 MAINS is defined as a hazardous live electrical supply system that powers equipment. Suitably rated measuring circuits may
be connected to the MAINS for measuring purposes.

NI 9792 WSN Real-Time Gateway User Guide and Specifications 5 ni.com
Caution Do not disconnect the power supply wires and connectors from the controller unless power
has been switched off.
Caution Do not install or remove the controller unless power has been switched off.
Caution Substitution of components may impair suitability for Class I, Division 2.
Caution For Zone 2 applications, install the WSN system in an enclosure rated to at least IP 54 as
defined by IEC 60529 and EN 60529.
Special Conditions for Hazardous Locations Use in Europe
The NI 9792 has been evaluated as Ex nA nL IIC T4 equipment under DEMKO Certificate No. 07
ATEX 0626664X. Each controller is marked II 3G and is suitable for use in Zone 2 hazardous locations,
in ambient temperatures of –40 °C ≤Ta ≤70 °C.
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory requirements and limits for electromagnetic
compatibility (EMC) as stated in the product specifications. These requirements and limits are designed
to provide reasonable protection against harmful interference when the product is operated in its
intended operational electromagnetic environment.
This product is intended for use in industrial locations. There is no guarantee that harmful interference
will not occur in a particular installation, when the product is connected to a test object, or if the product
is used in residential areas. To minimize the potential for the product to cause interference to radio and
television reception or to experience unacceptable performance degradation, install and use this product
in strict accordance with the instructions in the product documentation.
Furthermore, any changes or modifications to the product not expressly approved by National
Instruments could void your authority to operate it under your local regulatory rules.
The following statements contain important EMC information needed before installing and using this
product:
Caution This product is intended for use in industrial locations. As a result, this product may cause
interference if used in residential areas. Such use must be avoided unless the user takes special
measures to reduce electromagnetic emissions to prevent interference to the reception of radio and
television broadcasts.
Caution Changes or modifications not expressly approved by National Instruments could void the
your authority to operate the hardware under the local regulatory rules.
Caution Operate this product only with shielded cables and accessories.
Related Documentation
Check ni.com/manuals for the most recent hardware documentation. For a complete list of
documentation related to the NI WSN system, refer to ni.com/info and enter rdwsnrd.
In addition to this guide, the following documents may be useful when configuring your NI WSN
system.
• NI Wireless Sensor Network Getting Started Guide
• NI WSN-32xx User Guide and Specifications

NI 9792 WSN Real-Time Gateway User Guide and Specifications 6 ni.com
•Configuring WSN in MAX, available by selecting Start»All Programs»National Instruments»
NI-WSN
• The NI-WSN book on the Contents tab of the LabVIEW Help available by selecting Help»Search
the LabVIEW Help in LabVIEW
•NI-WSN Readme, available on the software installation disc included with your device.
Training Courses
If you need more help getting started developing an application with NI products, NI offers training
courses. To enroll in a course or obtain a detailed course outline, refer to ni.com/training.
Technical Support on the Web
For additional support, refer to ni.com/support or zone.ni.com.
Software Overview
Note Refer to the NI WSN Readme, available on the software installation disc included with your
device, for NI software application version support.
The NI-WSN software includes NI Measurement and Automation Explorer (MAX) as well as server and
driver software for easy integration into application software packages. These software components
manage the low-level communications and hardware details, simplifying programmatic access to
I/O channels. The NI-WSN software is on the software installation disc included with your
NI 9792 WSN gateway device. The NI-WSN software is supported by Windows 7/Vista/XP and
contains the following components:
•NIMAX
• NI-WSN software
You can download a current version of the NI-WSN software from ni.com/support. Using your Web
browser, go to ni.com/support and select Drivers and Updates»Distributed I/O»Wireless Sensor
Networks, and then select the latest version of NI-WSN software. If you are using other software, refer
to the installation instructions that accompany your software.
What You Need to Get Started
To set up and use NI LabVIEW Real-Time with the NI 9792 WSN Real-Time Gateway, you need the
following:
• NI 9792 WSN Real-Time Gateway device(s), with 9–35 V power supply
•NIWSN-32xx node devices, 9–30 V power supply, or four 1.5 V AA batteries for each node
• Mounting hardware (DIN rail or panel-mount)
• Ethernet cable/connection
• 1/8 in. flathead and number 1 Phillips screwdrivers
• NI-WSN 1.1 software or later
• Host PC running Windows 7/Vista/XP
• NI LabVIEW 2009 SP1 (32-bit) or later
• NI LabVIEW Real-Time 2009 SP1 (32-bit) or later
• Related hardware and software documentation

NI 9792 WSN Real-Time Gateway User Guide and Specifications 7 ni.com
• Optional accessories
– DIN rail terminal blocks
– I/O cables and sensors
– Mounting accessory
Unpack the Devices and Install the Antenna
Remove the devices from the package and inspect them. Contact NI if the devices appear damaged. Do
not install a damaged device.
Caution The device is static sensitive. Always properly ground yourself and the equipment when
handling or connecting to the device.
To attach the antenna, align it with the mount, as shown in Figure 4, and screw it on.
Caution The antenna must be attached to the NI WSN device in order for the NI WSN device to
function correctly.
Figure 4. Attach Antenna to Device

NI 9792 WSN Real-Time Gateway User Guide and Specifications 8 ni.com
Mounting the NI 9792 Device
You can mount the NI 9792 device on a panel, a 35 mm DIN rail, in an enclosure, or on a desktop. Use
the DIN-Rail mounting method if you already have a DIN rail configuration or if you need to be able to
quickly remove the device. Use the panel mount method for high shock and vibration applications. Use
an enclosure for harsh, dirty, or wet environments. For kit accessory ordering information, refer to the
accessory section of the NI WSN product page at ni.com.
Caution If the ambient temperature is above 60 °C, you must mount the NI 9792 on a thermally
conductive material. Measure the ambient temperature at each side of the NI 9792, 63.5 mm (2.5 in.)
from the side, and 25.4 mm (1 in.) from the back of the system.
Caution Your installation must meet the following requirements:
• Allows 25.4 mm (1 in.) of clearance above and below the NI 9792 device for air circulation.
•Allows 50.8 mm (2 in.) of clearance in front of the device for common connector cabling, such
as the 4-position detachable screw terminal connector.
Note Figure 5 is an actual size template. You can print it out and use it to determine screw hole
placement for panel mounting.

NI 9792 WSN Real-Time Gateway User Guide and Specifications 9 ni.com
Figure 5. NI 9792 Panel Mount Dimensions Template
114.3mm
(4.500 in.)
45.69 mm
(1.799 in.)
55.91 mm
(2.201 in.)
101.6 mm
(4.000 in.)

NI 9792 WSN Real-Time Gateway User Guide and Specifications 10 ni.com
Attaching to the NI WSN-3282 DIN Rail
Caution Power off the device before mounting it to the DIN rail.
The NI WSN-3282 DIN rail kit, NI part number 781074-01, contains one clip for mounting the device
on a standard 35 mm DIN rail. To mount the device on a DIN rail, complete the following steps:
1. Fasten the DIN rail clip to the device using a number 1 Phillips screwdriver and four 4-40 machine
screws. The screws are included in the DIN rail kit.
2. Make sure the DIN rail kit is installed as shown in Figure 6, with the larger lip of the DIN rail
positioned up.
Note Use 4-40 (finer thread) screw to affix the DIN rail clip to the device.
Figure 6. NI 9792 DIN Rail Installation
Figure 7. DIN Rail Installation Shown without the NI 9792

©National Instruments Corporation 11 NI 9792 WSN Real-Time User Guide and Specifications
Attaching the NI WSN-3283 Panel Mount Plate
The NI WSN-3283 panel mount kit, NI part number 781075-01, contains a plate for mounting the device
to a panel. To mount the device, complete the following steps:
1. Fasten the plate to the device using a number 1 Phillips screwdriver and 4-40 machine screws, as
shown in Figure 8. The screws are included in the NI WSN-3283 panel mount kit.
Figure 8. Mounting the NI 9792 to the Panel Mount Plate
2. Attach the device and attached plate to a wall or other surface using four to six number 8 or M4
screws. Refer to Figure 5 for the mounting hole template.
Setting Up the NI 9792 Device
Complete the following steps to prepare the NI 9792 device for use:
1. Before connecting the hardware, install NI LabVIEW and the NI-WSN driver software. You must
be an Administrator to install NI software and devices on your computer. The NI-WSN driver
software is on the software installation disc included with your device and is available for download
at ni.com/support. You must have NI LabVIEW 2009 SP1 (32-bit) or later, NI LabVIEW
Real-Time 2009 SP1 (32-bit) or later, and NI-WSN 1.1 and NI MAX installed to use the NI 9792.
Refer to the instructions included with your NI LabVIEW software to install NI LabVIEW.
Once NI LabVIEW is installed, complete the following steps:
2. Close all other applications.

NI 9792 WSN Real-Time Gateway User Guide and Specifications 12 ni.com
3. Insert the NI-WSN software installation disc into the drive on your computer.
4. Follow the onscreen instructions to install the NI-WSN software and NI MAX.
Note The NI Wireless Sensor Network Getting Started Guide is available after installation
from Start»All Programs»National Instruments»NI-WSN.
Make sure the NI 9792 device power is disconnected.
5. Attach a ring lug, as shown in Figure 9, to a 14 AWG (1.6 mm) wire. Connect the ring lug to the
ground terminal on the bottom of the device using the ground screw. Attach the other end of the
wire to the system ground.
Figure 9. Ring Lug Attached to the Ground Screw
1 Ring Lug Attached to the Ground Screw with Cable Attached
1

©National Instruments Corporation 13 NI 9792 WSN Real-Time User Guide and Specifications
Connecting the NI 9792 to a Network
Using a standard Category 5 (CAT-5) or better Ethernet cable, connect the NI 9792 to an Ethernet
network using the Ethernet port 1 on the NI 9792.
Caution To prevent data loss and to maintain the integrity of your Ethernet installation, do not use
a cable longer than 100 m. If you are using 100 Mbps Ethernet, National Instruments recommends
using a CAT-5 or better shielded twisted-pair Ethernet cable.
Note You will configure the IP settings and install software on the NI 9792, as described in the
Configuring IP Settings and Installing Software on the NI 9792 section, after connecting power and
powering the NI 9792 on.
The host computer communicates with the NI 9792 over a standard Ethernet connection. If the host
computer is on a network, you must configure the NI 9792 on the same subnet as the host computer. If
neither the host computer nor the NI 9792 is connected to a network, you can connect the two directly.
If you want to use the NI 9792 on a subnet other than the one the host computer is on, first connect the
NI 9792 on the same subnet as the host computer. Use DHCP to assign an IP address or reassign a static
IP address for the subnet where you want it to be and physically move it to the other subnet. The first
time you configure the NI 9792, you must also install software on it. Contact your network administrator
if you need assistance configuring the host computer and NI 9792 on the same subnet.
Note You must connect Ethernet port 1 to configure the NI 9792. You cannot configure the NI 9792
through Ethernet port 2.
In order to use Ethernet port 2, you must assign a static IP address to the port using MAX. The IP address
must be on a different subnet than the IP address of Ethernet port 1. You cannot use DHCP with Ethernet
port 2. For more information about using Ethernet port 2, go to ni.com/info and enter the info code
dualenet.
Wiring Power to the NI 9792
Caution You must use a UL Listed ITE power supply marked LPS with the NI 9792. The power
supply must also meet any safety and compliance requirements for the country of use.
Caution You must install the NI 9792 and tighten the captive screws before you apply power to the
NI 9792. Installing the NI 9792 while power is applied to it can cause damage to the device.
1. Install the ferrite shipped with the NI 9792 across the negative and positive leads of the power
supply, approximately 50–75 mm (2–3 in.) from the ends of the leads near the NI 9792, as shown
in Figure 10.
Figure 10. Wiring Power to the NI 9792

NI 9792 WSN Real-Time Gateway User Guide and Specifications 14 ni.com
2. Connect the positive lead of the power supply to the V1 or V2 terminal and the negative lead to one
of the C terminals.
3. Optionally, you can connect the positive lead of another power supply to the other V terminal and
the negative lead to one of the C terminals. You must install the ferrite across both pairs of wires.
Note If you connect power to both V1 and V2, you must ensure that the voltage difference between
the two power inputs, measured at the NI 9792 power connector, is at least 500 mV.
Note The NI 9792 draws power from either V1 or V2, depending on which terminal has a higher
voltage. It does not draw power from both terminals. The NI 9792 switches between V1 and V2
without affecting operation.
Caution The C terminals are internally connected to each other. If you use two power supplies, make
sure they share a common ground.
Caution The C terminals are internally connected to the NI WSN 9792 chassis to prevent a faulty
ground connection from causing the chassis ground to float. If you reverse the input voltage, the
positive input voltage is connected directly to the chassis. The NI 9792 has built-in reversed-voltage
protection, but reversed voltage can damage connected peripherals if the chassis ground is not
reliably connected to earth ground.
Caution Do not tighten or loosen the terminal screws on the power connector while the power
connector is plugged into the NI 9792 or while the power supply is on.
Powering On the NI 9792
Turn on each power supply to the NI 9792 system. The NI 9792 runs a power-on self test (POST).
During the POST, the POWER and STATUS LEDs turn on. When the STATUS LED turns off, the POST
is complete. If the LEDs do not behave in this way when the NI 9792 powers on, refer to the Device
Interface section.
Configuring IP Settings and Installing Software on the NI 9792
When you power on the NI 9792 for the first time, it boots into safe mode because there is no software
installed on it. This section describes how to configure the IP settings and install software on the
NI 9792.
Complete the following steps:
1. Launch MAX on the host computer and expand Remote Systems in the MAX configuration tree.
MAX lists the NI 9792 as the model name of the NI 9792 followed by the serial number, for
example, NI-NI9792-0146793C.
Tip If you cannot find the NI 9792 under Remote Systems, refer to the CONSOLE OUT Switch
section for information about using a serial connection and a terminal program for troubleshooting.
The NI 9792 automatically attempts to connect to the network using DHCP. If DHCP is not
available, the NI 9792 connects to the network with a link-local IP address with the form
169.254.
x . x .
2. Select the NI 9792 under Remote Systems to see the Network Settings tab in the middle pane of
MAX.
3. Enter a name for the RT target in the Name field.
4. (Optional) Enter a valid SNTP time server for the RT target in the Additional Configuration
section.
5. Select settings for the RT target in the IP Settings section, and click Apply.

©National Instruments Corporation 15 NI 9792 WSN Real-Time User Guide and Specifications
Note For information about configuring network settings, refer to the Configuring Network Settings
book of the MAX Remote Systems Help. In MAX, click Help»Help Topics»Remote Systems. On
the Contents tab, browse to LabVIEW Real-Time Target Configuration»Configuring Network
Settings.
6. Click Apply, and then click Yes at the prompt to reboot the NI 9792. You can also reboot the
NI 9792 by right-clicking the name under Remote Systems and selecting Reboot.
7. After rebooting, the NI 9792 appears under Remote Systems with the assigned name. Expand the
NI 9792 and select Software.
8. Click Add/Remove Software in the toolbar to launch the LabVIEW Real-Time Software Wizard.
9. Install LabVIEW Real-Time software and device drivers on the NI 9792.
After software installation, the NI 9792 automatically reboots. You can now program it using LabVIEW
Real-Time. For information about configuring the NI 9792 to launch an embedded stand-alone
application at startup, refer to the LabVIEW Help.
For more information about setting up the NI 9792 as an RT target, refer to the RT Getting Started Guide,
available on the host computer at Start»All Programs»National Instruments» LabVIEW 2009»
LabVIEW Manuals.
Using the Internal Real-Time Clock
The system clock of the NI 9792 is synchronized with the internal high-precision real-time clock at
startup. This synchronization provides timestamp data to the NI 9792. You can also use the internal
real-time clock to correct drift of the system clock. Refer to the Specifications section for the accuracy
specifications of the real-time clock.

NI 9792 WSN Real-Time Gateway User Guide and Specifications 16 ni.com
Device Interface
Figure 11 shows the NI 9792 device interface.
Figure 11. NI 9792 Device Interface
Connecting Serial Devices to the NI 9792
The NI 9792 has an RS-232 serial port to which you can connect devices such as displays or input
devices. Use the Serial VIs to read from and write to the serial port. For more information about the
Serial VIs, refer to the LabVIEW Help.
Figure 12. NI 9792 RS-232 Serial Port
1 Antenna RP-SMA Connector
2 9–35 VDC Power Connector
3 RS-232 Port
4USBPort
5 RESET Button
6 DIP Switches
7 RJ45 Ethernet Port 1, 10/100 LED
8ACT/LINK LED
9 RJ45 Ethernet Port 2, 10/100 LED
10 LEDs: POWER, ACTIVITY, STATUS, USER1
1
5
4
2
10
3
6
7
8
9
8
Pin 1
Pin 5
Pin 6
Pin 9

©National Instruments Corporation 17 NI 9792 WSN Real-Time User Guide and Specifications
Connecting USB Mass Storage Devices to the NI 9792
The NI 9792 supports common USB mass storage devices such as USB Flash drives and USB-to-IDE
adapters formatted with FAT16 and FAT32 file systems. LabVIEW usually maps USB devices to the
U:, V:, W:, or X: drive, starting with the U: drive if it is available. You can connect multiple USB mass
storage devices to the NI 9792 if you use a USB hub. Refer to the LabVIEW Help for more information.
Note If the NI 9792 is not in a hazardous location, you can connect and disconnect USB devices
without affecting operation.
Configuring DIP Switches
Figure 13. NI 9792 DIP Switches
All of the DIP switches are in the OFF position when the NI 9792 is shipped from National Instruments.
SAFE MODE Switch
The position of the SAFE MODE switch determines whether the embedded LabVIEW Real-Time
engine launches when the NI 9792 boots. If the switch is in the OFF position, the LabVIEW Real-Time
engine launches. Keep this switch in the OFF position during normal operation. If the switch is in the
ON position when the NI 9792 boots, the NI 9792 launches only the essential services required for
updating its configuration and installing software. In the latter case, the LabVIEW Real-Time engine
does not launch.
Table 1. DB-9 Pin Descriptions
Pin Signal
1DCD
2RXD
3TXD
4DTR
5GND
6DSR
7RTS
8CTS
9RI
SAFE MODE
CONSOLE OUT
IP RESET
NO APP
USER1
OFFON

NI 9792 WSN Real-Time Gateway User Guide and Specifications 18 ni.com
Move the SAFE MODE switch to the ON position if the software on the NI 9792 is corrupted. Even if
the switch is not in the ON position, if there is no software installed on the NI 9792, the NI 9792
automatically boots into safe mode. The SAFE MODE switch must be in the ON position to reformat
the drive on the NI 9792. Refer to the Measurement & Automation Explorer Help for more information
about installing software on the NI 9792 and reformatting the drive on the NI 9792.
CONSOLE OUT Switch
With a serial-port terminal program, you can use the CONSOLE OUT switch to read the IP address and
firmware version of the NI 9792. Use a null-modem cable to connect the serial port on the NI 9792 to a
computer. Move the switch to the ON position. Make sure that the serial-port terminal program is
configured to the following settings:
• 9,600 bits per second
• Eight data bits
• No parity
• One stop bit
• No flow control
The serial-port terminal program displays the IP address and firmware version of the NI 9792, and alerts
you when you connect an unsupported USB device to the NI 9792. Keep this switch in the OFF position
during normal operation.
IP RESET Switch
Move the IP RESET switch to the ON position and reboot the NI 9792 to reset the IP address and other
TCP/IP settings of the NI 9792 to the factory defaults. Refer to the Resetting the Network Configuration
section for more information about resetting the IP address.
NO APP Switch
Move the NO APP switch to the ON position to prevent a LabVIEW startup application from running
on the NI 9792 when the NI 9792 powers on. If you want to permanently disable the application from
running when the NI 9792 powers on, you must disable it in LabVIEW. To run an application when the
NI 9792 powers on, move the NO APP switch to the OFF position, create an application using the
LabVIEW Application Builder, and configure the application in LabVIEW to launch when the NI 9792
powers on. If you already have an application configured to launch when the NI 9792 powers on and
you move the NO APP switch from ON to OFF, the startup application is automatically enabled. For
more information about automatically launching VIs when the NI 9792 powers on and disabling VIs
from launching when the NI 9792 powers on, refer to the LabVIEW Help.
USER1 Switch
You can define the USER1 switch for your application. To define the purpose of this switch in your
embedded application, use the RT Read Switch VI in your LabVIEW RT embedded VI. For more
information about the RT Read Switch VI, refer to the LabVIEW Help.
Reset Button
The NI 9792 is equipped with a RESET button as shown in Figure 11. Pressing the RESET button resets
the NI 9792 in the same manner as cycling power.

©National Instruments Corporation 19 NI 9792 WSN Real-Time User Guide and Specifications
LED Indicators
The LED indicators for the NI 9792 device are listed in Table 2.
Table 2. LED State/Device Status
LED Description Color LED State Device Status
10/100 Green On Connected at 100 Mbps
Off No Ethernet connection or
10 Mbps connection
LINK/ACT Green On Ethernet link
Off No Ethernet connection
Blinking Ethernet activity
POWER Green/Yellow Green Powered from V1
Yellow Powered from V2
Off Power off